[WP Smush Pro] Smush and PHP 7.1

Hi,
We are looking to upgrade the PHP version to 7.1 on the network of sites to help increase the speed. I was asked to run a compatibility test for this using a plugin, and it returned some errors for the Smush plugin. Does the plugin work with PHP7.1?
See below for the errors returned:
FILE: /nas/content/live/ellipticalhost/wp-content/plugins/wp-smush-pro/lib/class-wp-smush-admin.php
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FOUND 1 ERROR AFFECTING 1 LINE
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374 | ERROR | Function name, class name, namespace name or constant name can not be reserved keyword '__DIR__' (since version 5.3)
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